Fluid-pressure brake.



No. 665,687. Patented lan. 8, |90I.

M. W. HIBBARD. FLUID PRESSURE BRAKE. (Aizplication led Aug. 1, 1900.)(No Model.) 2 Sheets-Sheet l.

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M. W. HIBBARD.

. FLUID PRESSURE BRAKE.

(Application filed Aug. 1, 1900.)

(No Model.) 2 Sheets-Sheet 2.

Umran- STATES MAURY W. HIBBARD, OF CHICAGO, ILLINOIS, ASSIGNOR .TORICHARD FITZGERALD, OF SAME PLACE.

FLUID-PRESSURE BRAKE`.

SPECIFICATION forming part of Letters Patent No. 665,687, dated January8, 1901.

Application iild August 1, 1900. Serial No. 25,522. (No model.)

To all whom, it may @o7/warm Be it known that I, MAURY W. HIBBARD, aresident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Fluid-Pressure Brakes,of which the following is a specification.

My invention has for its general object the provision of means forpreventing the unauthorized removal of the cap or cover of valve devicescommonly called triple valves and the stealing of the working partssuchas pistons, slide-valves, bushings, dac-which are usually, if notalways, made of brass.

The stealin g of the brass from triple valves of cars standing onsidings, switches, and in railroad-yards is of common occurrence and notonly entails great expense to the railroad company in replacing thestolen parts, but makes inoperative the valves which have been tamperedWith.

The inventionvof the within application for patent has special referenceand applicability to the form of valve known as the New York valve madeby the New York AirBrake Company; and its object is to provide suitablemeans for preventing entrance into the triple valve either by removing'the usual end cap or a side cap peculiar to this particular triplevalve.

I do not herein claim the broad idea of a lock to prevent entrance intoa triple valve or the like by unauthorized persons, having made thatinvention the subject-matter of another application filed simultaneouslyherewith; but I do claim herein a locking mechanism suited to thepeculiar construction of the New York valve or the Westinghouse valve.

In the drawings, Figure 1 is a side elevation of a New York valve withmy invention applied; Fig. 2, a top plan of the cap end of the valve;Fig. 3, an end elevation of the cap and clamp; Fig. 4, asection on line4 of Fig. 2; Fig. 5, a section on line 5 of Fig. 4, and Fig. 6 a sectionon line 6 of Fig. 4.

The valve device has the usual casing 1 and end cap 2, interposed disk3, and side cap 4. The end cap, which is held to the casing by capscrews or bolts 5, has the extension 6 and when removed affords entranceto the main pistons. The side cap is held to the casing by cap-screws 7and 8 and covers the chamber in which operates the piston-Valvegoverning the local release of train-pipe pressure to the atmosphere. Aclamp 9, which passes over the end cap from side to side, has at one enda hook 10, engaging under the fiange 11 of the valve-casing, and alsohas a projecting arm 12, beveled at its end and received by thetriangular recess 13 in one side of the cap-screw`7. The other end ofthe clamp has an extension or enlargement 14, in which is aspring-barrel 15. A bolt having a head 16 and stem 17 is adapted toreciprocate in this barrel and when the clamp is in place to enter achamber 18, extending into the flange 11 of the casing, being normallypressed therein by the spring 19. The stem 17 is of such length as tostrike the end of the barrel when the bolt-head is flush with thesurface of the clamp. A loose piston 2O travels in chamber 18 and isadapted to contact the bolt and move the same when iiuid-pressu re isadmitted against the piston in a manner to be described. .A passage 2lleads from this chamber 1S in the rear of the piston to the end of thecasing proper, when it connects with a cross-passage 22, which may becut in the usual gasket 23. connects with a passage 24, whichcommunivcates with a chamber 25, located in the casing and having apassage 26 leading into the triple valve. A valve or screw plug 27screws into chamber 25 and has at its lower end a valve proper, which isnormally seated on a brass bushing 28, which is preferably provided.This valve governs the flow of {inidpressure from the interior of thetriple valve and through passages 26, 24, 22, and 2l to chamber 18.

As shown in Fig. 3, the clamp has a yoke 29,'provided with asomewhat-elongated opening 30, adapted to receive the extension 6 of thevalve-cap 2. Inasmuch as this extension is not central of the cap, it isnecessary to provide the opening so made and located in order that theclamp may be swung on or oi". After the caps are in place the clamp isinserted over the extension and is swung around,

The cross-passage 22- IOO so that the arm 12 will engage screw 7 andbolt-head 16 will enter chamber 1R, being pressed therein by spring 19.Both caps are no7 securely locked against removal by unauthorizedpersons the cap 4 because one of its screws cannot be turned and the cap2 because it is embraced by the clamp. In case it should be desired toopen the caps, which is at a time when the duid-pressure is present inthe triple valve or is accessible at the track side, the valve or plug27 is unscrewed to unseat and thereby7 admit pressure from the triplevalve to chamber 18 and against the piston 20, forcing the latteragainst the bolt 16, pressing the same inward into its barrel until itsstem lstrikes the end thereof. At this time the meeting'faces of thepiston and bolt are in the plane of the parting-line or junction of theclamp and casing, and the clamp is thereupon in condition to be removed.The valve 27 may be closed after admitting the Huid-pressure, as abovedescribed, and before removing the clamp, so as to prevent anypossibility of blowing out the piston 20.

As is Well known, the stealing of the parts occu rs When the cars arestanding on sidings, switches, or on yards-that is, When not connectedto the brake system on the locomotive-and consequently the brass-thievesare thwarted, because at this time the triple valves are not chargedwith duid-pressure, Whereas the clamp is dependent for unlocking uponduid-pressure.

I claim- 1. The combination, with a valve device for actuatingfluid-pressure brakes and provided with separate and independent capscovering or inclosing removable and valuable Working parts Within thevalve device, of means for locking all such caps to the device toprevent the unauthorized removal thereof and the theft of such Workingparts.

2. The combination of a triple valve having a casing and a plurality ofclosing caps or covers and a iuid-pressure-controlled clampsimultaneously engaging such caps to lock them to the casing.

3. The combination oi' a triple valve havinga casing and an end capprovided with an extension, a clamp passing over the cap and having ahole or opening to receive such eX- tension aud means for locking theclamp to the casing.

4. The combination of a triple valve having a casing and a removablecap, a bolt securing such cap to the casing and means for preventingunscrewing of the bolt.

5. The combination of a triple valve having a casing and a removablecap, a bolt securing such' cap to the casing, a clamp having a portionthereof engaging such bolt to prevent unloosening and means for securingthe clamp to the casing.

6. The combination of a triple valve having a casing and the usual endcap and also a side cap, a clamp extending over the end cap and having aprojecting arm arranged to prevent removal of the side cap and afluidpressure-actuated lock for holding the clamp to the casing.'

7. The combination of a triple valve having a casing and the usual endcap and also a side cap secured bya bolt, a clamp having at one end ahook engaging the casing and also a projecting arm engaging such bolt,and a locking-bolt located in the other end of the clamp and engagingthe casing.

8. The combination of a triple valve having a casing and the usual endcap and also a side cap, a screw 7 having a groove or recess on oneside, a clamp having a hook at one end engaging the casing and alsohaving an arm 12 engaging in said groove of the screw, such clamppassing over the end cap, and a fluid-pressure-actuated bolt located inthe other end of the clamp and engaging the casing.

MAURY WV. HIBBARD. Witnesses:

SAMUEL E. HIBBEN, LOUISE E. SERAGE.

